<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <script src="bootstrap-3.4.1-dist/js/jquery-3.6.0.min.js"></script>
  <script src="bootstrap-3.4.1-dist/js/bootstrap.min.js"></script>
  <link rel="stylesheet" href="./bootstrap-3.4.1-dist/css/bootstrap.min.css">
  <title>Bootstrap的使用</title>
  <style>
    #parent {
      height:400px;
      background: #ddd;
    }
    #parent .container {
      height:400px;
      border:1px solid red;
    }
  </style>
</head>
<body>
  <div class="container-fluid" id="parent">
    <div class="container">
      测试内容
    </div>
  </div>
</body>
</html>